University of New Hampshire Institute of Earth, Oceans, and Space, Morse Hall, 8 College Road, Durham NH 03824, USA

present address: US Geological Survey, National Center, 12201 Sunrise Valley Dr., MS 432, Reston VA 20192, USA

University of New Hampshire Institute of Earth, Oceans, and Space, Morse Hall, 8 College Road, Durham NH 03824, USA

University of New Hampshire Institute of Earth, Oceans, and Space, Morse Hall, 8 College Road, Durham NH 03824, USA

present address: US Military Academy, Department of Chemistry and Life Science, West Point NY 10996, USA

University of New Hampshire Institute of Earth, Oceans, and Space, Morse Hall, 8 College Road, Durham NH 03824, USA

University of New Hampshire Department of Chemistry, Parsons Hall, 23 Academic Way, Durham NH 03824, USA

University of New Hampshire Institute of Earth, Oceans, and Space, Morse Hall, 8 College Road, Durham NH 03824, USA

present address: Department of Chemistry, Appalachian State University, Boone NC 28608, USA

University of New Hampshire Institute of Earth, Oceans, and Space, Morse Hall, 8 College Road, Durham NH 03824, USA

present address: Department of Earth & Atmospheric Sciences, The University of Houston, Houston TX 77204, USA